Add filtering to kaehmy list

webapp/views.py

@@ -1,5 +1,6 @@
 """Webapp views."""
 
+from django.db.models import Count
 from django.shortcuts import render, redirect
 from django.contrib.auth import login, logout, authenticate
 from django.views.decorators.http import require_http_methods
@@ -226,11 +227,20 @@ def ohlhafv_list(request, *args, **kwargs):
 def kaehmy_list_view(request, *args, **kwargs):
     """Kaehmy application list"""
 
-    applications = KaehmyForm.objects.order_by('-timestamp')
+    role_filter = request.GET.get('role', None)
+    if role_filter is not None and str(role_filter) != '-1':
+        applications = KaehmyForm.objects.filter(custom_roles__id=role_filter) | KaehmyForm.objects.filter(preset_roles__id=role_filter)
+    else:
+        applications = KaehmyForm.objects.all()
+
+    applications = applications.order_by('-timestamp')
+    filter_options_preset = PresetKaehmyRole.objects.annotate(form_count=Count('forms')).filter(form_count__gt=0)
+    filter_options = [(r.id, r.name, r.form_count) for r in filter_options_preset]
 
     context = {
         'applications': applications,
-        'application_count': len(applications)
+        'application_count': len(applications),
+        'filter_options': filter_options
     }
     return render(request, 'kaehmy_list.html', context)